NASA SWIFT Mission: GRB 060211: Swift detection of a long burst
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 4736
SUBJECT: GRB 060211: Swift detection of a long burst
DATE: 06/02/11 10:13:41 GMT
FROM: Hans Krimm at NASA-GSFC krimm@milkyway.gsfc.nasa.gov
C. Hurkett (U Leicester), A. Beardmore (U. Leicester), O. Godet (U. Leicester), J. A. Kennea (PSU), H. Krimm (GSFC/USRA), F. Marshall (GSFC), J. Osborne (U. Leicester), D. Palmer (LANL), A. Parsons (GSFC) on behalf of the Swift Team:
At 09:39:11 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060211 (trigger=181126). The BAT on-board calculated location is RA,Dec 58.402d, +21.486d {03h 53m 36s, +21d 29′ 09″} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Since this was a 128 second image trigger, we cannot determine the nature of the light curve from the TDRSS light curve. We will be able to comment on the time structure when we receive the full data set in a few hours. The Swift spacecraft slewed promptly onto the BAT position.
The XRT began observing the field at 09:42:07 UT, 177 seconds after the BAT trigger. XRT found a bright, fading, uncatalogued X-ray source located at RA(J2000) = 03h 53m 32.5s, Dec(J2000) = +21d 29′ 19.3″, with an estimated uncertainty of 5.0 arcseconds (90% confidence radius). This location is 55 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 2.5s image was 6.7e-09 erg/cm2/s (0.2-10 keV).
UVOT took a finding chart exposure of 200 seconds with the V filter starting 183 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7’x2.7′ sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 18th mag. The 8’x8′ region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18.0 mag. No correction has been made for the expected extinction of about 0.6 magnitudes.
